PORT OF SPAIN (Reuters) - Mud spewing out of the sea five miles off the eastern coast of Trinidad could be a mud volcano that could form a new, temporary island, a seismologist said on Thursday.

Richard Robertson, head of the Caribbean nation's Seismic Research Unit, said the mud was pouring out of an opening or several openings in an underwater hill or mountain at a depth of 40-50 feet near the Point Radix coast.

"It's probably looking more and more like a mud volcano," Robertson said in an interview.

"Waves are breaking around it, which suggests that it is just below the water surface so it's only a matter of time when it breaches the surface. Even if a so-called island is formed, it will eventually submerge because it is made of mud and is loose," he said.

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